@eric
You can also left click the leftmost bar, the one labelled with C0, C1, C2, etc., hold the mouse button and move the mouse cursor left and right AFAIR — no need to touch the keyboard.
Or was it up and down? 🤔 In any case, you can do it with just the pointing device.
@eric
Yeah, I could even vaguely remember it not being obvious, but wasn't motivated enough to check 🤭